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Note 3 - Variable Interest Entities (Detail) - Summary financial information of Myers included in the consolidated statements of operations: (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues | $ 630,507 | $ 501,156 | $ 459,893
Operating income | 14,979 | (52,234) | 35,910
Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Revenues | 84,877 | 7,153 |
Operating income | 2,152 | 531 |
Net income (loss) attributable to Sterling common stockholders | $ 694 | $ 170 |

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